Dictionary of Human Evolution and Biology

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Cell Cycle

Life events of an individual cell, from mitosis to mitosis. In most proliferating somatic cells, the cell cycle consists of four phases: mitotic phase, gap 1 phase (G1 growth1), S phase (S synthesis), and gap 2 phase (G2 growth2). The last three occur during interphase, the mitotic stage consists of four additional subphases. In some cell types, the G1 phase may be quite protracted. Arrest of the cell cycle is an important feature of many organisms, including humans.

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